基于分形理论的裂隙岩体地下水溶质运移模拟  

SIMULATION ON SOLUTE TRANSPORT IN FRACTURED ROCKS BASED ON FRACTAL THEORY

作　　者：王锦国[1] 周志芳[1] 

机构地区：[1]河海大学地质及岩土工程系,南京210098

出　　处：《岩石力学与工程学报》2004年第8期1358-1362,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(50179010);国家自然科学重点基金(50239070);河海大学科技创新基金(2003410943);河海大学双聘院士基金资助项目

摘　　要：岩体裂隙面是粗糙不平的,具有分形特征。裂隙本身可以看成由上下两裂隙面叠合而成的,可以应用分形几何理论来模拟粗糙裂隙面和裂隙张开度的分布情况。在用分形理论模拟裂隙面及裂隙张开度的基础上,用特征有限元方法对粗糙裂隙中的溶质运移进行了模拟。模拟结果显示,考虑裂隙面的粗糙度,模拟其中的溶质运移更符合实际情况。与平均张开度下光滑裂隙中的溶质运移相比,粗糙裂隙中的浓度锋面更落后,而且存在不均匀性和各向异性的特点。Rough fracture surface is of characteristics of fractal and can be considered as congruence of the upper and lower fracture surfaces. The rough fracture surface and the distribution of fracture apertures can be simulated by fractal theory. The simulation is made on solute transport in rough fractures by characteristic FEM based on the fracture face and fracture apertures simulated by using fractal theory. The result of simulation shows that it is more actual to simulate solute transport in fractures with its roughness considered. In contrast with the solute transport in smooth fractures with average aperture,the frontal surface of concentration in a rough fracture is more behindhand and is of characteristics of nonuniformity and anisotropy.

关 键 词：岩石力学 分形 粗糙度 地下水 溶质运移模拟 岩体裂隙面 

分 类 号：P641.2[天文地球—地质矿产勘探]